Choose the correct words to complete the sentence:
It was so cold that we couldn't go out.
Step 1: The phrase ``so...that" is used to indicate a result or consequence. In this sentence, the cold was so intense that the consequence was they couldn't go out.
Step 2: The other Option don't fit the context:
- ``Too...to" would mean something was excessively cold to the point of not being able to do something, but ``so...that" is the appropriate construction here.
- ``Neither...nor" and ``either...or" are used for negative or alternative conditions, which don't fit in this case.
Thus, the correct answer is option (A) so, that.